These erased with the 253.7nm mercury line. It is an array of floating-gate transistors individually programmed by an electronic device that supplies higher voltages than … I don’t think I’ve ever seen a ceramic one. Blue LEDs came out in 1993. Those 3W UV flashlights are pretty cheap on eBay, they’re very good for curing UV glue, I guess they would work fine on EPROMs too. They were still working on making LEDs good, especially in terms of output. Each color was a different process, it took “forever” before blue and white (I recall in that order) arrived. It takes some time to erase the data in EPROM. Evgeny has added a new log for Serial Data Visualization. The EPROM needs UV light to erase the data. Standard DIP packages cannot be erased with a … 0000251183 00000 n According to Wikipedia, the 68000 was “introduced” in 1979, but initial samples shipped in February 1980 and first production began in November. Need an EEPROM eraser? 0000284241 00000 n When I saw “blue” LEDs in the drawer of the electronics shop in the 80ies, they were really IR in a blue casing. done. We did have fun, about 1975 in high school, asking the physic’s teacher how they worked. Thank you for buying the ART UV-1 Eprom Eraser. Operate the UV source for a measured length of time, say 10 minutes. Wow, Cool idea, i will try this. There’s little need for these chip erasers now, so how do you erase and program a chip these days? An EPROM eraser is not selective, it will erase the entire EPROM. 0000000967 00000 n Tanning bulbs and Germicidal lamps shouldn’t be looked at without eye protection, and you shouldn’t even let the light from the Germicidal lamps on your skin. Learn more, https://spectrum.ieee.org/tech-talk/tech-history/silicon-revolution/rcas-forgotten-work-on-the-blue-led, https://en.wikipedia.org/wiki/Emission_spectrum, https://www.mouser.com/ds/2/43/851_datasheet-16963.pdf, https://bkpmedia.s3.amazonaws.com/downloads/manuals/en-us/851_manual.pdf, https://www.aliexpress.com/af/eprom-eraser.html, http://hardware.speccy.org/datasheet/D2764.pdf, https://www.youtube.com/watch?v=v_p5RIVnl9A, All The Good VR Ideas Were Dreamt Up In The 60s. Blue LEDs were around as early as 1972. This almost burnt down the house, and after a second round of erasing of six hours under the lamp, there were still unerased bits. 5. Though not commercially available. you might want to try the sun lol.. about 3-4 weeks.. no seriously though about 20 mins in a cheapo china eraser.. my production eprom eraser takes about 10 min.. really nukes it. SAFETY INTERLOCK; 4 WATT TUBE. It eventually worked, allowing [Charles]’ project, a vintage liquid crystal display, to have the right data using vintage-correct parts. Lol I had dug my EPROM eraser out only a couple of days ago and dusted it off to try and cure some UV glue but the wavelength of the eraser was too short for the glue :(. 6. The conversion consisted in removing the IR radiator, which was used as resistive ballast for the lamp and replacing it with two parallel fluorescent tube chokes. The HAD write-up is misleading (presently). 0000001651 00000 n Ultraviolet EPROM Eraser can support Timer function. LIFE OF TUBE 6000 HRS; ULTRAVIOLET LAMP. The kit also includes a separate power pack for the eraser which allows it to be used stand-alone if the programming unit is … The compact desktop DE-4 accommodate up to eight EPROMs and uses a 4-watt shortwave tube with a typical erasure time of 8,3 minutes. Thats what I use to do back in the day. An EPROM that is left under too long can become over-erased. This was in 1997, https://en.wikipedia.org/wiki/Shuji_Nakamura. Getting Started To power up the UV-1, connect a 9 Volt 500 mA DC adapter to the power connector on the side. With this vintage chip erased, [Charles] slapped together an EPROM programmer — with a programming voltage of 21V — out of an ATMega and a bench power supply. startxref Well theres one good thing that came from China then! 0000000016 00000 n So I left them in overnight. This also erased the eprom. 0000052471 00000 n Solar Flares And Radio Communications — How Precarious Are Our Electronics? Shorter = more energy, which should mean more effective curing. In my experience, most commercial EPROM erasers take 10-20 minutes to do a reliable erasure regardless of whether you are erasing PIC micros, EPROM's (like 27C256)or any other windowed device. And those parts are all ceramic packages. Our ability to generate UV light has improved dramatically over the last fifty years, and [Charles] remembered he had an assortment of LEDs, including a few tiny 5mW UV LEDs. There are LEDs that go into the 200nm range, but expect to pay well over $30 a piece and they are only for a couple of milliwatts of power…. Transistors used in EPROM have a higher resistance. The spectrum of iron is educational – lookit all that stuff at the top. These functions make it trivial to store and retrieve the structure data to/from the EEPROM. Fortunately, old electronics are highly resistant to abuse, so he pulled out the obvious equipment to erase this chip, a 300 watt tanning lamp. To erase an EPROM. My bad — I found another for $2.67. The current commercial BK Precision 851 UV eraser uses a 10W bulb (https://www.mouser.com/ds/2/43/851_datasheet-16963.pdf). Leave them outside in the sun for a couple days and they will be erased as well. Many of the UV fluorescent tubes suitable for curing resist are essentially blacklight tubes. He didn’t know. But that’s obsolete for me anway. :) LOL! The strong smell of ozone and nitrogen oxides the lamp produced made it difficult to understand how anybody would have exposed his skin voluntarily to the radiation of this lamp. Back in the ealry 80s I used to use a Manaslu(?) 64 32 0000001392 00000 n Nah, the longer the wavelength the longer it takes. Nice to know that the UV LED’s can do it as well. Bulbs for killing germs seemed to be a common source of erasing bulbs forty years ago. I’ll have to try it, I have a couple I need erasing and the worst that could happen is nothing at all. The way they work is that every time you write one or more bytes in a page, that page is erased and rewritten with the old content + new content. Eu-Version ( 230 V/50 Hz ) and get ( ) and US-Version ( 120 V/60 Hz ) US-Version... 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